Gas burner



March 14, .1933. F 1 (30X 1,901,086

GAS BURNER F'liled June v13, 1932 2 Sheets-Sheet a4 f 4 a4; a4

4 Fiyi@ Cay March 14, 1933. J COX 1,901,086

GAS BURNER Filed June 13, 1932 2 Sheets-Sheet 2 625' @fr 2f H15 l Patented Mar. 14, 1933 PlkrlaN'r-` oFFlcrE.

FREDERICK JOHN COX, OF TUFNELL PARK, LONDON, ENGLAND Gas BURNER.

Application led June 13, 1932, Serial No. 616,849, and in Great Britain May 28, 1931.

15 from opposite sides of the upper surface o the combustion chamber so as to be immediately over combustible mixture holes extending `from a mixin kchamber intothe base of the combustion c amber. The material of 2 the burner surface is preferably a refractory material.

The burner surface element is preferably formed of a number of separate longitudinal combustion chambers arranged parallel to each other below the outer surface of the element and extending the full width thereof, each combustion chamber having in its base a series of holes extending to the mixin chamber. Each combustion chamber is pre erably arranged parallel to the outer surface of the burner and to each other and with the slot arranged to conuey the combustion products to the surface of the burner.

rlFhe undulating character of the slots ensures that there will be no straight channels or combustion outlets in the heating surface of the burner. v

rIhe whole of the refractory portion may be built up of strips or portions connected together by any suitable cement or material such as a heat insulating material, the complete burner surface element bein held in a suitable casing forming a cham r behind l, 5 the surface element adapted to be connected to the supply of combustible mixture or supplies of the diilerent ingredients for forming a combustible mixture. v

If desirable the refractory surface with its slits or combustion products passages may be separate from the combustion chambers or the surface may be formed by separate elements connected to the walls of the combustion chambers.

A manner of carrying out the invention is illustrated by the Vaccompanying drawings,

wherein Figure 1 is a sectional elevation of one form of the burner on line A--A of Figure 2, Figure 2 a plan of the same, Figure 3 is a detail of a cover for the inlet of the combustible mixture, Figure 4 a sectional eleva- 60 tion of a modification of the burner shown in Figure 1and is taken on line B-B of Figure 5, and Figure 5 is a plan of the said modification, and Figure 6 is a sectional elevation showing a nozzle. modification of Figure 4.

In these drawings a is the refractory material of the burner surface element, b a container in the upper portion of which is supported the burner surface element a and of which the lower portion forms a mixing chamber for the combustible constituents.

In the burn'er surface element a are formed combustion chambers a1, a1, arranged parallel to each other and to the outer surface a2 75 of the refractory material a.

Extending from the combustion chambers al, al to the outer surface a are narrow slits or passages a3, a3 for the escape of the products of combustion. In Figures 2 and 5 the 80 passages a3 are shown undulating and extending across the surface a2 and with the corners of the undulations angular. In Figure 2 the corners of the undulations are right angles whereas in Figure/"5 they are slightly larger than right angles so as to give the undulations inclined sides. The passages a3, a3 are formed between adjacent undulating portions of the material of the burner surface a2', and

such adjacent portions extend in opposite directions from the upper portions of the sides manufacturing the refractory burner surface.

The upper portion b1 of the container b is widened to form a ledge on which the refractory material a rests and against which it is'held by cement b2.

In the base of the container b is provided `an opening b3 forming an -inlet to the burner for the combustible mixture. This opening 118 is covered on its inner side with a perforated baiile b4. If preferred the baiile can be made without perforations.

B means of a burner having a refractory sur ace element a made in accordance with the present invention, the combustible constituents are ignited in the combustion passages al and so rapidly raise the superimposed refractory material of the burner face a2 to a high temperature, while the inner surface or layer below the combustion passage a1 is at a comparatively low temperature and can 'be madeV of any suitable material differing from that of the outer layer and preferably a heat insulating material. The invention comprises what may be considered a modified surface combustion a paratus in which the combustion is effected 1n a restricted space immediately below the surface.

In Figure 6 are shown strip. members `a8 containing the holes a4 conveying the combustible mixture to the combustion chambers or passages a1, a1 each member a8 being provided with a reduced upper portion a9 extending into the said combustion chamber a1. If preferred'the strips a8 may be made without the reduced upper portion a9 When'the combustion element a is built up of a number of strips of refractory material cemented together or to an intermediate member containing combustible mixture passages aA, each strip is formed with a portion of a combustion chamber, coincident with that of the adjacent strip.

What I claim and `desireto secure by Letters Patent is 1. A gas burner comprising a burner surface element having a combustion chamber arranged below its outer surface, and means for supplying combustible gas tothe combustion chamber, the surface element having aA slot extending from the combustion chamber to the outer surface of the element, each side of the slot being inthe form of a'series of undulations forming proections extending from the opposite slde o the slot over the combustion chamber and over said means:

2. A gas burner comprising a burner sur,- face element havin a plurality of combustion chambers arrange below its outer surface, a mixin chamber supporting said element, a plurallty of holes in 'the inner portion of said element connecting said combustion chambers and said mixing chamber, the surface element having a plurality of slots each'extending from one of the combustion chambers to the outer surface of said element, each -side of each slot being in the form of a series of undulations forming projections extending from opposite sides of the slot over the combustion chamber and over one of said holes.v

3." A gas burner comprising a' burner surface element constructed of a number of component strips of refractory material cemented together in which is formed a longitudinal combustion chamber arranged below the outer surface of the surface element, an o en casing for supporting at its opening t e surface element and forming a gas mixing chamber thereunder, an inlet to the mixing chamber for combustible ases, a series of holesV in 'the inner portion o the burner surface element extending from the mixing chamber to the lower surface of the combustion chamber and formed in the divisions-between the comc ponent strips, the surface element having a slot extendin from the ulpper portion of the combustion c amber to t e outer surface of `the surfaceelement of which the sides form portions of the sides of the component stri s, l

each side of the slot being in the form o a series of undulations forming projections extending from opposite sides of the slot over the combustion chamber, the projections on one side of the slot extending lnto the recess on the opposite side thereof and each over one 

